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<B><A HREF="TOUPPER.html">TOUPPER(3)</A></B>	       FreeBSD Library Functions Manual 	    <B><A HREF="TOUPPER.html">TOUPPER(3)</A></B>


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<H2>NAME</H2><PRE>
     <B>toupper</B> - lower case to upper case letter conversion


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<H2>SYNOPSIS</H2><PRE>
     <B>#include</B> <B>&lt;ctype.h&gt;</B>

     <I>int</I>
     <B>toupper</B>(<I>int</I> <I>c</I>)


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<H2>DESCRIPTION</H2><PRE>
     The <B>toupper</B>() function converts a lower-case letter to the corresponding
     upper-case letter.  If the argument is a lower-case letter, the <B>toupper</B>()
     function returns the corresponding upper-case letter if there is one;
     otherwise the argument is returned unchanged.


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<H2>SEE ALSO</H2><PRE>
     <B><A HREF="isalnum.html">isalnum(3)</A></B>,  <B><A HREF="isalpha.html">isalpha(3)</A></B>,  <B><A HREF="isascii.html">isascii(3)</A></B>,  <B><A HREF="iscntrl.html">iscntrl(3)</A></B>,  <B><A HREF="isdigit.html">isdigit(3)</A></B>,
     <B><A HREF="isgraph.html">isgraph(3)</A></B>,  <B><A HREF="islower.html">islower(3)</A></B>,  <B><A HREF="isprint.html">isprint(3)</A></B>,  <B><A HREF="ispunct.html">ispunct(3)</A></B>,  <B><A HREF="isspace.html">isspace(3)</A></B>,
     <B><A HREF="isupper.html">isupper(3)</A></B>,  <B><A HREF="isxdigit.html">isxdigit(3)</A></B>,	<B><A HREF="stdio.html">stdio(3)</A></B>,  <B><A HREF="toascii.html">toascii(3)</A></B>,	<B><A HREF="tolower.html">tolower(3)</A></B>,  <B><A HREF="ascii.html">ascii(7)</A></B>


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<H2>STANDARDS</H2><PRE>
     The <B>toupper</B>() function conforms to ISO 9899: 1990 (``ISO C'').

BSD				 June 4, 1993				     1
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